graphics driver

hello sir, i have the dell inspiron n5010 15R,  512MB graphics card, 32-bit Laptop, when i installed the windows-7 he take automatic driver for graphccs card which is "standard graphics adapter", bur my laptop could not give me the full access about that, my drivers are "ATI Mobility Radeon HD 4330 80@450MHz". I have the backup of my all drivers but it cant download? ? im in truble plz giv me the right path thanku!